text: import { asyncRouterMap, constantRouterMap } from '@/router';
  
  /**
   * 通过meta.role判断是否与当前用户权限匹配
   * @param roles
   * @param route
   */
  function hasPermission(roles, route) {
    if (route.meta && route.meta.roles) {
      return roles.some(role => route.meta.roles.indexOf(role) >= 0);
    } else {
      return true;
    }
  }
  
  /**
   * 递归过滤异步路由表，返回符合用户角色权限的路由表
   * @param asyncRouterMap
   * @param roles
   */
  function filterAsyncRouter(asyncRouterMap, roles) {
    const accessedRouters = asyncRouterMap.filter(route => {
      if (hasPermission(roles, route)) {
        if (route.children && route.children.length) {
          route.children = filterAsyncRouter(route.children, roles);
        }
        return true;
      }
      return false;
    });
    return accessedRouters;
  }
  
  const permission = {
    state: {
      routers: constantRouterMap,
      addRouters: []
    },
    mutations: {
      SET_ROUTERS: (state, routers) => {
        state.addRouters = routers;
        state.routers = constantRouterMap.concat(routers);
      }
    },
    actions: {
      GenerateRoutes({ commit }, data) {
        return new Promise(resolve => {
          const { roles } = data;
          let accessedRouters;
          if (roles.indexOf('admin') >= 0) {
            accessedRouters = asyncRouterMap;
          } else {
            accessedRouters = filterAsyncRouter(asyncRouterMap, roles);
          }
          commit('SET_ROUTERS', accessedRouters);
          resolve();
        });
      }
    }
  };
  
  export default permission;
  